CN108915062B - Sponge city municipal rainwater treatment pipeline design method - Google Patents
Sponge city municipal rainwater treatment pipeline design method Download PDFInfo
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- CN108915062B CN108915062B CN201810806843.9A CN201810806843A CN108915062B CN 108915062 B CN108915062 B CN 108915062B CN 201810806843 A CN201810806843 A CN 201810806843A CN 108915062 B CN108915062 B CN 108915062B
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000013461 design Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 57
- 239000010865 sewage Substances 0.000 claims description 35
- 238000005086 pumping Methods 0.000 claims 2
- 239000003344 environmental pollutant Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003973 irrigation Methods 0.000 description 2
- 230000002262 irrigation Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/02—Arrangement of sewer pipe-lines or pipe-line systems
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F2201/00—Details, devices or methods not otherwise provided for
- E03F2201/10—Dividing the first rain flush out of the stormwater flow
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Abstract
A design method for municipal rainwater treatment pipelines in sponge cities reduces pollution of initial rainwater by adopting different rainwater drainage treatment systems in different areas in cities, and avoids threat of the initial rainwater to urban ecological environment. Meanwhile, the initial rainwater storage pool is optimally set according to the rainfall condition for many years, so that the municipal administration department realizes automatic treatment on the aspect of municipal drainage engineering control, and the management efficiency is improved.
Description
Technical Field
The invention relates to the technical field of municipal drainage treatment, in particular to a design method of a municipal rainwater treatment pipeline for a sponge city.
Background
With the increasing development speed of national socioeconomic, the serious consequences of developing the urban economy at the cost of sacrificing the ecological environment are gradually appearing, and numerous domestic provinces and regions face a series of problems including flood disasters, rainwater runoff pollution and the like, so that the normal life of urban residents is seriously influenced, and meanwhile, the long-term stable development of the national socioeconomic is also hindered.
The sponge city is a brand new city development concept proposed internationally at present. The sponge city is compared with the city construction as the name implies, hope that under the condition of strong rainfall climate such as rainstorm, the city can be transformed into a large sponge with extremely strong water absorption capacity, a large amount of rainwater resources are fully collected and utilized, then purification and secondary treatment of the rainwater resources are realized by applying a series of modern scientific and technical means, and necessary water is provided for city greening, road cleaning and the like. Therefore under the 'sponge city' theory, municipal drainage engineering needs to be changed into the comprehensive drainage engineering integrating the functions of penetration, water storage, purification, water utilization and drainage from the past rapid drainage and the nearby drainage, so that the city can rapidly show the 'sponge' function under the weather conditions of strong rainfall and the like, and then the problems of waterlogging, rainwater runoff pollution and the like in the city are effectively prevented.
In municipal drainage works in "sponge cities", initial rain pollution is an important problem to be dealt with. When rainfall occurs, pollutants are deposited when the rainfall impacts the ground surface, and a large amount of pollutants are contained in initial rainwater due to the influence of various precipitates and organic wastes, the pollution degree of the pollutants even exceeds that of urban sewage, and the pollutants pose a serious threat to the urban ecological environment. As rainfall increases over time, the contaminant concentration gradually decreases and eventually remains in a lower concentration range. The drainage system of the city can be optimized by applying the sponge city concept, so that the initial rainwater and the subsequent rainwater are subjected to shunting treatment.
Different areas in a city are polluted to different degrees, and areas with higher pollution degrees exist, such as roads, bridges, factories, parking lots, garbage dumps, industrial parks and the like, are influenced by traffic activities and losses of vehicles, automobile exhaust, solid waste, industrial sewage, polluted particulate matters and the like, and have larger pollution in early rain in rainfall; there are also areas with a low degree of pollution, such as parks, greenbelts, squares, etc., which are subject to a low degree of pollution and which are subject to a low degree of pollution from the initial rain during rainfall. In the prior art, after the initial rainwater is treated by shunting the rainwater to a storage well, the initial rainwater is conveyed to a sewage treatment plant through an independent sewage treatment pipeline for treatment, however, two sets of pipelines are required to be arranged in the method, the construction difficulty is high, and meanwhile, the treatment burden of the sewage treatment plant can be increased by conveying the initial rainwater in the area with low pollution degree to the sewage treatment plant. In order to solve the above problems, an improved municipal rainwater treatment system has been proposed in the prior art, in which a sewage treatment line is provided only in an area with a high degree of pollution, initial rainwater in the area is delivered to a sewage treatment plant through the sewage treatment line, and in which no sewage treatment line is provided in an area with a low degree of pollution, all rainwater in the area is discharged to a river through a municipal drainage line or stored for irrigation in green space, thereby reducing the difficulty of pipeline construction and the burden of the sewage treatment plant. However, higher initial rain pollution may also occur in areas with lower levels of pollution, for example, where the precipitation concentration of pollutants increases at longer intervals during the rain cycle, resulting in higher initial rain pollution levels in areas with lower levels of pollution, and discharge of such initial rain into rivers or for irrigation poses a threat to the urban ecological environment.
In order to solve the problems, the sponge municipal rainwater treatment system is provided with a second primary rainwater storage well in an area with lower pollution degree, primary rainwater is stored in the second primary rainwater storage well when primary rainwater pollution rises, and the primary rainwater is extracted and then conveyed to a sewage treatment plant for treatment when the water level in the second primary rainwater storage well reaches a threshold value. However, in this solution, the time when the water level reaches the threshold is uncertain, and it is difficult for the municipal administration to determine when to treat the first rain stored in the second first rain storage well, resulting in management difficulties.
Disclosure of Invention
The invention further provides a design method of the municipal rainwater treatment pipeline in the sponge city, which can enable a municipal pipeline department to uniformly treat the primary rainwater of the second primary rainwater storage well in the second area in a certain period, thereby improving the management efficiency.
The invention provides a design method of a municipal rainwater treatment pipeline in a sponge city, which comprises the following steps: (1) arranging a first rainwater collecting pipe in an area with a large pollution degree, and collecting rainwater in the area; (2) a first primary rain storage well is arranged below the first rain water collecting pipe and used for storing primary rain water in the area; (3) the first primary rain storage well and a sewage treatment plant are connected through a sewage treatment pipe, and primary rain water in the first primary rain storage well is conveyed to the sewage treatment plant for treatment; (4) the first rainwater collecting pipe is connected through a first municipal rainwater pipe, and rainwater behind initial rainwater is discharged through a municipal rainwater pipeline; (5) a second rainwater collecting pipe is arranged in the area with less pollution and is used for collecting rainwater in the area; (6) a second primary rain storage well connected with the second rain collecting pipe through a first electromagnetic valve is arranged; (7) arranging a water level measuring instrument for measuring the second initial rain storage well in the second initial rain storage well; (8) a second municipal rainwater pipe connected with the second rainwater collecting pipe through a second electromagnetic valve is arranged; (9) setting a rainfall timer for calculating the interval between the current rainfall time and the last rainfall time; (10) the controller is arranged and used for determining the switches of the first electromagnetic valve and the second electromagnetic valve when the rainfall occurs at present according to the rainfall time interval determined by the rainfall timer; (11) a water suction pump is arranged in the second primary rain storage well, rainwater in the second primary rain storage well can be pumped to a rainwater transportation storage container on the ground, and the rainwater transportation storage container can convey the rainwater received by the rainwater transportation storage container to a sewage treatment plant for treatment; the method is characterized in that: in the step (6), determining the capacity and the water level threshold of the second initial rain storage well according to the average precipitation condition in the region for many years; in the step (11), a rainwater storage container is dispatched to the second area according to a specific period of the capacity interval of the second primary rain storage well or when the water level of the second primary rain storage well reaches the water level threshold value, rainwater in the second primary rain storage well is extracted through a water suction pump and conveyed to a sewage treatment plant for treatment.
Preferably, the areas with higher pollution degree comprise roads, bridges, factories, parking lots, industrial parks and other areas; the areas with small pollution degree comprise parks, greenbelts, squares and other areas.
Preferably, in the step (6), the number of times that the rainfall interval is greater than the time threshold in the last decade within a half year is counted in a half year period, five times with the largest number are selected, the average value N is calculated, and then the capacity V = N × V of the second initial rain storage well is determined1×, wherein V1The flow rate of the primary rain in the second area is a redundancy coefficient and can be set to be between 1.15 and 1.3.
Preferably, in the step (11), the specific period is half a year, and the water level threshold is a water level depth corresponding to a time when the second primary rain storage well contains rainwater up to 0.95V.
Preferably, when the rainfall time interval is greater than the threshold value, the controller opens the first electromagnetic valve at the early stage of rainfall, closes the second electromagnetic valve, collects the initial rainwater of the second area through the second initial rainwater storage well, then closes the first electromagnetic valve, opens the second electromagnetic valve, and discharges the rainwater behind the initial rainwater through a municipal rainwater pipeline; and when the rainfall time interval is smaller than the threshold value, closing the first electromagnetic valve, opening the second electromagnetic valve, and discharging all the rainwater rainfall at present through a municipal rainwater pipeline.
Preferably, the threshold value of the time interval is determined according to the degree of contamination of the second area.
Preferably, the threshold value for the time interval is set to 30 days, 40 days or 50 days.
Preferably, the municipal rainwater pipeline discharges rainwater to a river channel or is used for irrigating green belts after being collected.
Preferably, the transport rainwater storage container is a vehicle provided with a water storage container.
Preferably, the rainwater storage system further comprises a communication module, and the controller transmits a signal to a municipal administration department through the communication module when the water level of the second primary rainwater storage well reaches a threshold value, and the municipal administration department dispatches a rainwater storage container to the second area according to the received signal and conveys rainwater in the second primary rainwater storage well to a sewage treatment plant for treatment.
Drawings
FIG. 1 is a schematic structural diagram of a municipal rainwater treatment system for sponge cities according to an embodiment of the invention.
FIG. 2 shows steps of a design method of a municipal rainwater treatment pipeline for sponge cities according to an embodiment of the invention.
Detailed Description
In order to more clearly illustrate the technical solutions of the present invention, the present invention will be briefly described below by using embodiments, and it is obvious that the following description is only one embodiment of the present invention, and for those skilled in the art, other technical solutions can be obtained according to the embodiments without inventive labor, and also fall within the disclosure of the present invention.
The municipal rainwater treatment system for the sponge city, disclosed by the embodiment of the invention, is shown in figure 1 and comprises a first rainwater collecting pipe, a first primary rainwater storage well, a sewage treatment pipe, a first municipal rainwater pipe, a second rainwater collecting pipe, a second primary rainwater storage well, a first electromagnetic valve, a second municipal rainwater pipe, a second electromagnetic valve, a rainfall timer, a controller, a water level measuring instrument, a water pump and a transportation rainwater storage container.
The design method of the municipal rainwater treatment pipeline in the sponge city of the embodiment of the invention is as shown in figure 2, (1) a first rainwater collecting pipe is arranged in an area with a large pollution degree and is used for collecting rainwater in the area; (2) a first primary rain storage well is arranged below the first rain water collecting pipe and used for storing primary rain water in the area; (3) the first primary rain storage well and a sewage treatment plant are connected through a sewage treatment pipe, and primary rain water in the first primary rain storage well is conveyed to the sewage treatment plant for treatment; (4) the first rainwater collecting pipe is connected through a first municipal rainwater pipe, and rainwater behind initial rainwater is discharged through a municipal rainwater pipeline; (5) a second rainwater collecting pipe is arranged in the area with less pollution and is used for collecting rainwater in the area; (6) a second primary rain storage well connected with the second rain collecting pipe through a first electromagnetic valve is arranged; (7) arranging a water level measuring instrument for measuring the second initial rain storage well in the second initial rain storage well; (8) a second municipal rainwater pipe connected with the second rainwater collecting pipe through a second electromagnetic valve is arranged; (9) setting a rainfall timer for calculating the interval between the current rainfall time and the last rainfall time; (10) the controller is arranged and used for determining the switches of the first electromagnetic valve and the second electromagnetic valve when the rainfall occurs at present according to the rainfall time interval determined by the rainfall timer; (11) the water suction pump is arranged in the second initial rain storage well, rainwater in the second initial rain storage well can be pumped to the subaerial rainwater transportation storage container, and the rainwater received by the rainwater transportation storage container can be transported to a sewage treatment plant for treatment.
And (2) arranging the first rainwater collecting pipe in the first area in the step (1) for collecting rainwater in the first area. The first region includes the higher region of pollution degree, including areas such as road, bridge, mill, parking area, dump, industrial park, these areas receive the traffic activity and the consume of vehicle, automobile exhaust, solid waste, industrial sewage, pollution particulate matter etc. influence, and initial stage rainwater has great pollution when the rainfall, even twice rainfall interval is shorter, and the pollutant concentration that contains in the initial stage rainwater is also great, need collect sewage treatment plant with initial stage rainwater and handle.
In the step (2), a first initial rain storage well is arranged below the first rain water collecting pipe and used for storing initial rain water collected by the first rain water collecting pipe in the first area. The first rain collecting pipe and the first rain storage well are connected through a pipeline, and the first rain collecting pipe is connected with the first rain storage well through a pipeline. And (4) in the step (3), the first initial rain storage well is connected with a sewage treatment plant through a sewage treatment pipe, and initial rain water in the first initial rain storage well can be conveyed to the sewage treatment plant for treatment.
And (4) arranging a first municipal rainwater pipe connected with the first rainwater collecting pipe, discharging rainwater behind initial rainwater of the first area through a municipal rainwater pipeline, and controlling the communication and closing of the first rainwater collecting pipe and the first municipal rainwater pipe through a valve. Municipal administration rainwater pipeline can be used for irrigating the greenbelt after discharging the rainwater of the non-first rain that does not have the pollution to the river course or collecting.
And (5) arranging a second rainwater collecting pipe in the second area for collecting rainwater in the second area. The second area comprises areas with lower pollution degree, including parks, greenbelts, squares and other areas, the pollution degree is lower when the pollution deposition time is shorter, and the pollution of initial rainwater is lower during rainfall; when the interval between two rainings is long, the pollution deposition time is long, and the pollution degree of the initial rain water is increased.
And (6) arranging a second primary rain storage well connected with the second rainwater collecting pipe through a first electromagnetic valve, wherein the second primary rain storage well can collect rainwater in the second area according to the rainwater pollution condition of the second area. The second is rain storage well just and is not provided with municipal sewage treatment pipeline. And determining the capacity and the water level threshold of the second initial rain storage well according to the average precipitation condition of the area for many years. Specifically, the number of times that the rainfall interval is greater than the time threshold value in the last decade within half a year is counted by taking half a year as a period, and selection is performedFive times of the times are the maximum, the average value N is calculated, and then the capacity V = N × V of the second initial rain storage well is determined1×, wherein V1The flow rate of the primary rain in the second area is a redundancy coefficient and can be set to be between 1.15 and 1.3; the water level threshold is set to the corresponding water level depth when the rainwater contained in the second initial rainwater storage well reaches 0.95V.
In the step (7), a water level measuring instrument is arranged in the second primary rain storage well and used for measuring the water level of the second primary rain storage well, so that rainwater in the second primary rain storage well is prevented from overflowing after exceeding the water level of the second primary rain storage well. And (8) arranging a second municipal rainwater pipe connected with the second rainwater collecting pipe through a second electromagnetic valve, and discharging rainwater passing through the second municipal rainwater pipe through a municipal rainwater pipeline. In the step (9), a rainfall timer is set, and the rainfall timer records the current rainfall time during rainfall and is used for calculating the interval between the current rainfall time and the previous rainfall time. The rainfall timer may or may not include a separate sensor for detecting rainfall, and may be in communication with the meteorological department via a network to determine the time interval between the current and last rainfall.
And (10) setting a controller, and determining whether the initial rainwater of the current rainfall needs to be stored according to the rainfall time interval determined by the rainfall timer, so as to determine the switch of the first electromagnetic valve and the second electromagnetic valve. Specifically, when the rainfall time interval is greater than the threshold value, the controller indicates that the pollution degree of the initial rainwater of the current rainfall is high, the first electromagnetic valve is opened at the early stage of the rainfall, the second electromagnetic valve is closed, and the initial rainwater of the second area is collected through the second initial rainwater storage well; after the initial rainwater is collected, closing the first electromagnetic valve, opening the second electromagnetic valve, and discharging the rainwater behind the initial rainwater through a municipal rainwater pipeline; when the rainfall time interval is smaller than the threshold value, the controller indicates that the pollution degree of the initial rainwater of the current rainfall is low, closes the first electromagnetic valve, opens the second electromagnetic valve, and discharges all the rainwater of the current rainfall through the municipal rainwater pipeline. The threshold value of the rainfall time interval can be determined according to the pollution degree of the second area, and for example, the threshold value of the time interval can be set to 30 days, 40 days or 50 days.
Since the capacity of the second primary rain storage well is set according to the rainfall condition of many years in the step (6), according to the setting period in the step (6), the rainwater storage containers are dispatched to the second primary rain storage well at the specific interval in the step (11), and the rainwater in the second primary rain storage well is transported to a sewage treatment plant for treatment through a water suction pump. The rainwater storage container may be a vehicle provided with a water storage container. The water suction pump can be arranged in the second primary rain storage well, and can also be arranged in the rain water storage container, and the water suction pump is placed in the second primary rain storage well when water is required to be pumped. In order to avoid the situation that frequent rainfall exceeds many years of rainfall, when the specific period is not reached, the second first rain storage well stores excessive initial rainwater, when the water level in the second first rain storage well reaches the water level threshold value, the controller transmits the information to the municipal administration department through the communication module, and the municipal administration department timely processes the rainwater in the second first rain storage well according to the information.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and are intended to be within the scope of the invention.
Claims (3)
1. A design method of a municipal rainwater treatment pipeline for a sponge city comprises the following steps: (1) arranging a first rainwater collecting pipe in an area with a large pollution degree, and collecting rainwater in the area; areas with large pollution degree comprise roads, bridges, factories, parking lots and industrial parks; (2) a first primary rain storage well is arranged below the first rain water collecting pipe and used for storing primary rain water in the area; (3) the first primary rain storage well and a sewage treatment plant are connected through a sewage treatment pipe, and primary rain water in the first primary rain storage well is conveyed to the sewage treatment plant for treatment; (4) connect through first municipal rainwater pipe first rainwaterThe rainwater storage method comprises the steps of (1) collecting rainwater after initial rainwater is discharged through municipal rainwater pipelines, (5) arranging a second rainwater collecting pipe in an area with low pollution degree, wherein the area with low pollution degree comprises a park, a greenbelt and a square, (6) arranging a second initial rainwater storage well connected with the second rainwater collecting pipe through a first electromagnetic valve, wherein the second initial rainwater storage well is not provided with a municipal sewage treatment pipeline, (7) arranging a water level measuring instrument for measuring the second initial rainwater storage well in the second initial rainwater storage well, (8) arranging a second municipal rainwater pipe connected with the second rainwater collecting pipe through a second electromagnetic valve, (9) arranging a rainfall timer for calculating the interval between the current rainfall time and the last rainfall time, (10) arranging a controller for determining the switch of the first electromagnetic valve and the second electromagnetic valve during the current rainfall according to the rainfall time interval determined by the rainfall timer during the initial rainfall, and (11) arranging a water pump in the second rainwater storage well, wherein the water level in the second initial rainwater storage well can be sent to the ground for pumping, the rainwater is stored in the rainwater storage well, the average time is determined by the number of the fifth year, and the rainwater storage well is more than the fifth year, wherein the rainwater storage time is determined by the fifth year, and the rainwater storage well, wherein the rainwater storage time is the rainwater storage well, the rainwater storage time of the rainwater storage well, wherein the rainwater storage well is determined by the fifth year, the rainwater storage time of the rainwater storage well, the rainwater storage well is the rainwater storage well, the rainwater storage time of the rainwater storage well, the fifth rain storage well is1×, wherein V1Setting the flow of the primary rain in the second area as a redundancy coefficient between 1.15 and 1.3; in the step (11), sending a rainwater storage container to the second area according to a specific period of the capacity interval of the second primary rain storage well or when the water level of the second primary rain storage well reaches the water level threshold value of the second primary rain storage well, pumping rainwater in the second primary rain storage well through a water suction pump, and conveying the rainwater to a sewage treatment plant for treatment; the specific period is half a year, and the water level threshold is the corresponding water level depth of the second primary rain storage well when the rainwater contained in the second primary rain storage well reaches 0.95V.
2. The design method of the sponge city municipal rainwater treatment pipeline according to claim 1, characterized in that: the municipal rainwater pipeline discharges rainwater to the river channel or is used for irrigating green belts after collecting.
3. The design method of the sponge city municipal rainwater treatment pipeline according to claim 2, characterized in that: the transport rainwater storage container is a vehicle provided with a water storage container.
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2018
- 2018-07-21 CN CN201810806843.9A patent/CN108915062B/en not_active Expired - Fee Related
Patent Citations (7)
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| CN102619272A (en) * | 2012-03-31 | 2012-08-01 | 重庆大学 | Comprehensive control method for town water pollution in three gorges reservoir area |
| KR20140109602A (en) * | 2013-03-06 | 2014-09-16 | 주식회사 예건 | Rainwater storing system with primary rainwater treatment abillity |
| CN105649174A (en) * | 2015-12-31 | 2016-06-08 | 武汉美华禹水环境有限公司 | Rainwater discarding control system and method |
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| CN206360068U (en) * | 2016-11-17 | 2017-07-28 | 广州城建职业学院 | Pond is collected by filtration in a kind of rain water drainage |
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